package org.example.test;


import java.text.SimpleDateFormat;
import java.util.Random;

public class ThreadLocalExample implements Runnable{
    private static final ThreadLocal<SimpleDateFormat>formatter=ThreadLocal.withInitial(()->
            new SimpleDateFormat("yyyy-MM--dd :HH-mm"));
            
    public static void main(String[]args){
     ThreadLocalExample obj=new ThreadLocalExample();
     for(int i=0;i<10;i++){
         Thread t=new Thread(obj,""+i);
         try {
             Thread.sleep(100);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
         t.start();
     }
    }
    @Override
    public void run() {
        System.out.println("Thread Name="+Thread.currentThread().getName()+" "+"default formatter="+formatter.get().toPattern());
        try {
            Thread.sleep(new Random().nextInt(1000));
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        formatter.set(new SimpleDateFormat());
        System.out.println("Thread Name="+Thread.currentThread().getName()+" "+"formatter="+formatter.get().toPattern());

    }
}
